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Get threads working on all platforms

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We now have a high-quality clone() implementation for creating
lightweight threads on Linux/Windows/FreeBSD/NetBSD/OpenBSD.
This commit is contained in:
Justine Tunney 2022-05-12 17:52:13 -07:00
parent 4e62cefa6e
commit fec396037a
43 changed files with 850 additions and 532 deletions
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29
libc/intrin/setjmp.internal.h Normal file
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#ifndef COSMOPOLITAN_LIBC_INTRIN_SETJMP_INTERNAL_H_
#define COSMOPOLITAN_LIBC_INTRIN_SETJMP_INTERNAL_H_
#include "libc/limits.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
/**
* Encodes nonzero number for longjmp().
*
* This is a workaround to the fact that the value has to be non-zero.
* So we work around it by dedicating the highest bit to being a flag.
*/
static inline int EncodeLongjmp(int x) {
return x | INT_MIN;
}
/**
* Decodes nonzero number returned by setjmp().
*
* This is a workaround to the fact that the value has to be non-zero.
* So we work around it by dedicating the highest bit to being a flag.
*/
static inline int DecodeSetjmp(int x) {
return (int)((unsigned)x << 1) >> 1;
}
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_INTRIN_SETJMP_INTERNAL_H_ */